<template>
    <!-- 工作日历 -->
    <div>
        <!-- 年和月 -->
        <el-row type="flex" justify="end">
            <!-- 年 用组件给定一个日期，日期获取年，年取前五年 + 后五年 -->
            <el-select v-model="currentYear" size="small" style="width: 120px" @change="dataChange">
                <el-option v-for="item in yearList" :key="item" :label="item" :value="item" />
            </el-select>
            <el-select v-model="currentMonth" size="small" style="width: 120px;margin-left: 10px" @change="dataChange">
                <!-- 循环 -->
                <el-option v-for="item in 12" :key="item" :label="item" :value="item" />
            </el-select>
        </el-row>
        <!-- 放置一个日历组件 -->
        <el-calendar v-model="currentDate">
            <template slot="dateCell" slot-scope="{ date, data }">
                <!-- date是当前单元格的日期 data是对象 对象里有要显示的day -->
                <!-- <template v-slot:dateCell="{ date, data }"> -->
                <div class="date-content">
                    <span class="text"> {{ data.day | getDay }}</span>
                    <span v-if="isWeek(date)" class="rest">休</span>
                </div>
            </template>
        </el-calendar>
    </div>
</template>

<script>
export default {
    filters: {
        getDay(value) {
            const day = value.split('-')[2]
            return day.startsWith('0') ? day.substr(1) : day
        }
    },
    props: {
        startDate: {
            type: Date,
            // 回调函数式的返回值
            default: () => new Date() // 如果没有传递startDate 就取当前时间
        }
    },
    data() {
        return {
            yearList: [], // 要遍历的年的数组
            currentYear: null, // 当前年份
            currentMonth: null, // 当前月份
            currentDate: null // 当前时间
        }
    },
    created() {
        // 获取当前的年份
        this.currentYear = this.startDate.getFullYear() // 得到当前的年份
        this.currentMonth = this.startDate.getMonth() + 1 // 当前月份
        // 快速生成数组的方法
        this.yearList = Array.from(Array(11), (v, i) => this.currentYear + i - 5)
        // 钩子函数执行完成之后
        this.dataChange() // 主动调用一下方法
    },
    methods: {
        dataChange() {
            // 生成新的日期
            this.currentDate = new Date(`${this.currentYear}-${this.currentMonth}-1`) // 以1号为开始
        },
        // 判断当前是否是周末
        isWeek(date) {
            return date.getDay() === 6 || date.getDay() === 0
        }
    }
}
</script>
<style  scoped>
/deep/ .el-calendar-day {
    height: auto;
}

/deep/ .el-calendar-table__row td,
/deep/ .el-calendar-table tr td:first-child,
/deep/ .el-calendar-table__row td.prev {
    border: none;
}

.date-content {
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 14px;
}

.date-content .rest {
    color: #fff;
    border-radius: 50%;
    background: rgb(250, 124, 77);
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
    font-size: 12px;
    margin-left: 10px;
}

.date-content .text {
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;

}

/deep/ .el-calendar-table td.is-selected .text {
    background: #409eff;
    color: #fff;
    border-radius: 50%;
}

/deep/ .el-calendar__header {
    display: none
}
</style>
